摘要:
A lens includes a central portion and a surrounding portion. The central portion has a first and a second optical surfaces. The surrounding portion surrounds the central portion and has an inner refraction wall and an outer refraction wall. The outer refraction wall includes a first and a second outer surfaces. A distance between the symmetry axis and a junction of the inner refraction wall and the first optical surface is a first radius R1. A distance between the symmetry axis and a junction of the first outer surface and the second optical surface is a second radius R2. A distance between the symmetry axis and a junction of the second outer surface and the first outer surface is a third radius R3. The third radius R3 is greater than the second radius R2, and the second radius R2 is greater than or equal to the first radius R1.
摘要:
A light source module including an optical film and at least one light source unit is provided. The light source unit and the optical film enclose a space. The light source unit includes a reflecting device, at least one light bar, and a collimated unit. The reflecting device is disposed under the optical film. The light bar includes a plurality of light-emitting elements arranged along a third direction. The collimated unit extends along a direction parallel to the third direction and includes an upper reflective portion and a lower reflective portion. A shortest distance between one end of the lower reflective portion located adjacent to the reflecting device and the optical axis of the light-emitting elements along a second direction is defined as a first half light-emitting width, which is gradually increased along the third direction from a center portion of the collimated unit towards two sides thereof.
摘要:
A light emitting unit includes a light source device and a reflector. The light source device extends in parallel with an extension direction, and is capable of providing a light beam. The reflector is configured under the light source device and extends in parallel with the extension direction. The reflector has a first protrusion and a pair of second protrusions located on two sides of the first protrusion, the first protrusion has a peak portion and two trough portions, the second protrusion has a peak portion and a trough portion, and the two trough portions of the first protrusion are respectively connected to the trough portions of the two second protrusions to provide a fluctuant reflection surface, and a height of a cross section contour of the pair of the second protrusions in parallel with the extension direction is decreased from a centre to two ends of the reflector.
摘要:
A backlight module including a chamber, a bottom reflector, a plurality of light sources, and a plurality of lenses is provided. The chamber has a bottom surface and a side surface. The bottom reflector is disposed inside the chamber and located on the bottom surface. The light sources are disposed inside the chamber and located above the bottom reflector. Each light source is adjacent to the side surface and provides light. The lenses are disposed on a transmission path of the light. Each lens has a back surface, a cavity on the back surface, and a light-emitting surface. The cavity has a light-incident surface. Each light source is arranged corresponding to one of the lenses and adjacent to the cavity. The light, after passing the lenses, is divided into light beams with different propagating directions. The light beams irradiate the bottom reflector.
摘要:
A displaying method of a digital light processing (DLP) projector includes the steps of: providing a light modulation device including a driver printed circuit board and a digital micromirror device (DMD), wherein the DMD includes a plurality of micromirrors each having a first stable state and a second stable state, and a predetermined light incident direction, the DMD is installed on the driver printed circuit board; providing an illumination light beam being incident on the DMD along an operating direction different from the predetermined light incident direction, modulating the illumination light beam to an imaging light beam by the DMD and directing the imaging light beam to a projection lens for projecting an image. A DLP projector made thereby has a relatively lower manufacturing cost.
摘要:
An adjusting device for positioning an integration rod within an optical engine module is provided. The optical engine module includes a casing having four sidewalls defining an optical path. The integration rod is disposed in the optical path. Each sidewall has a screw hole. The adjusting device includes two adjusting screws extending through the screw holes in two adjacent sidewalls of the casing in order to abut against the integration rod, thereby adjusting the position of the integration rod in the optical path and two positioning screws extending through the screw holes in remaining two adjacent sidewalls of the casing to abut against the integration rod for immobilizing the integration rod within the casing.
摘要:
A projection apparatus includes an illumination system, a projection module and at least a filter. The illumination system is for generating an illumination light beam. The projection module is for receiving the illumination light beam from the illumination system and projecting an image according to the illumination light beam. The filter is disposed in the illumination system and located on a light path defined by the illumination light beam. The filter comprises a first filtering part and a second filtering part. A minimum wavelength of a wavelength range of transmitted light of the second filtering part is larger than a minimum wavelength of a wavelength range of transmitted light of the first filtering part, or a maximum wavelength of a wavelength range of transmitted light of the second filtering part is smaller than a maximum wavelength of a wavelength range of transmitted light of the first filtering part.
摘要:
The present invention is a combination structure for a hollow integration rod, wherein each reflective plate of the hollow integration rod has at least one convexity and at least one concavity. As the hollow integration rod is assembled, each two adjacent reflective plates are wedged by the corresponding convexity and concavity. At last, the structure of the hollow integration rod is fixed by a fixing component.
摘要:
An optical projection apparatus includs an illumination system, a projection lens and a reflective light valve between the illumination system and the projection lens. The illumination system includes a first light source assembly, a second light source assembly, a first light integration rod, a second light integration rod and a dichroic mirror. A first light beam and a second light beam with different spectrum are provided by the first light source assembly and the second light source assembly, respectively. Moreover, the projection lens, the reflective light valve and the dichroic mirror are disposed on the transmission path of the first and the second light beam. The dichroic mirror allows the first light beam to pass through, and reflects the second light beam, to make the transmission path of the first and the second light beam identical.
摘要:
A light-source module includes an optical film and at least one light-source unit, which together enclose a space. The light-source unit includes a reflective assembly, a light-concentrating unit and at least one light-emitting assembly. The light-concentrating unit has a light exiting end and a light incidence end, and the light exiting end faces the space enclosed by the light-source unit and the optical film. The optical-axis direction of the light-emitting assembly is defined as a first direction, and the direction perpendicular to both the first direction and the optical film is defined as a second direction. The length of the light-concentrating unit in the first direction is defined as a light-concentrating distance, the width of the light exiting end in the second direction is defined as a light exiting width, and the ratio of the light-concentrating distance over the light exiting width is greater than 0.5 but less than 10.